Product Details These mandrels have a 2.35mm shank so they will fit into many Dremel or hobby drills or pendant drills / flex shafts. There are a couple of styles so make sure you order the right ones. The top threaded mandrels are for the cylinder and bullet points. The top screw mandrels are for the wheels and knife edge wheels. Pin mandrel, the rubber burr is secured and released, by screwing/ unscrewing the upper section of the mandrel (tightens/ loosens a collet around the rubber burr).
